options nvidia PreserveVideoMemoryAllocations=0 in /lib/modprobe.d/50-nvidia-default.conf fixes the issue. Lines: options nvidia NVreg_TemporaryFilePath=/var/tmp options nvidia NVreg_EnableS0ixPowerManagement=1 - not needed. As you identify - duplicate of boo#1226116 Final 50-nvidia-default.conf attached. This can be closed off. Thanks for all your efforts.